Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43738
Title: High-mode effects on seismic performance of multi-story self-centering braced steel frames
Authors: Qiu, CX
Zhu, S 
Keywords: Energy dissipation capacity
High-mode effect
Multi-story steel frame
Post-yield stiffness ratio
Self-centering brace (SCB)
Issue Date: 2016
Publisher: Elsevier
Source: Journal of constructional steel research, 2016, v. 119, p. 133-143 How to cite?
Journal: Journal of constructional steel research 
Abstract: Seismic-resisting, multi-story steel frames with self-centering braces (SCBs) are numerically investigated through pushover and incremental dynamic analyses. The seismic performance of self-centering braced frames (SC-BFs) is systematically compared with that of buckling-restrained braced frames (BRBFs), with emphasis on high-mode effect. The concentration of inter-story drift in the upper part of the buildings is more significant in SC-BFs than in BRBFs as a result of this effect. This high-mode effect strengthens with the increasing intensity of ground motions. Parametric studies indicate that increasing the post-yield stiffness ratio and/or energy dissipation capacity can successfully improve the seismic performance of SC-BFs, particularly in terms of limiting the high-mode effect. SC-BFs with enhanced post-yield stiffness and energy dissipation capacity exhibit relatively uniform inter-story drift ratios and reduced record-to-record variability in seismic performance.
URI: http://hdl.handle.net/10397/43738
ISSN: 0143-974X
EISSN: 1873-5983
DOI: 10.1016/j.jcsr.2015.12.008
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